Solstice Illuminated: A Year of Sky . ... Credit Copyright: Ken Murphy ( MurphLab ); Music: Ariel ( Moby ) Explanation: Can you find which day is the winter solstice? ... With 360 movie panels, the sky over (almost) an entire year is shown in time lapse format as recorded by a video camera on the roof of the Exploratorium museum in San Francisco , California . ... In the videos , darkness indicates night, blue depicts clear day, while gray portrays pervasive daytime cloud cover. ...